ABSTRACT
Background and Objective: Computed Tomography of brain (CT brain) is a higher radiation dose imaging technique than in the conventional radiographic examination. Not only the brain but also the orbits may included in the area of scanning. The radiation risk of CT brain to patient was the effect of radiation damage to the lens of eye which is the radiosensitive organ. Which may induced cataracts. In 2005, the Multislice CT was set up in Sappasittiprasong hospital Ubonrajchathani. The majority of CT examination was CT brain. There is no previous study to determine the radiation dose delivered to the eye of the lens. The result of scattered radiation dosimetry may provide to evaluate of radiation risk to the patient. This study aim to measure the scattered radiation dose to the lens of the eyes in Rado Phantom during scanning CT brain.Method : An experimental study was performed at Physics Department, Faculty of Science, Ubonrajchathani University and Sappasit-tiprasong hospital Ubonrajchathani. Using the thermoluminescence dosimeter (TLD). The TLD discs model TLD–100 and TLD Reader in model 3500 provided by Harshaw. The TLD–100 discs were attached directly to both eye of Head rando phantom and they were scanned to measure the scattered radiation dose to the lens during procedures. The protocol for brain examination was 120 kV 250 mAs. Result: The mean scattered radiation dose to lens of head rado phantom was 13.87 mGy .Conclusion: The measured dose was lower than the reported threshold of lens opacity and well cataract. Keywords: Scattered Radiation Dose, Computed Tomography of brain, lens dose, thermoluminescence dosimeter (TLD)
ABSTRACT
Rationale and objectives: The implementation of X-rays used in medical benefits within the hospital to assist in the diagnosis bodies controlling radiation safety have suggested that a survey of patients receive from the imaging radiation. For surveillance and risk assessment of hazards that may be the dose that patients receive from the imaging radiation in Chest radiography compared with the reference dose of agencies in different countries.Methods: An analytical descriptive study is done by using radiation units of Srinagarind Hospital Department of Diagnostic Radiology, Faculty of Medicine, Khon Kaen University and calculating technique to estimate Entrance Skin Dose (ESD) from radiographic procedures. The data receive from 400 patients using technical factors in imaging of patients to radiation for chest radiography. Started from January - June 2009 and then were analyzed the relationship between the sample radiation dose and reference radiation dose.Results: This study found that the entrance skin dose found in skin patients. Set of techniques for patients irradiated for chest radiography. The results revealed that the mean and the third quartile (75th percentile) dose were 0.2 and 0.23 mGy, respectively, which fairly smaller than the dose IAEA standard reference and other research.Conclusion: The average skin dose patients received in the general chest X-ray imaging. Compared with the reference dose level research found that dose levels lower than any research. Study the radiation dose to the skin of patients received radiation from common imaging method can be measured easily and conveniently. We supposed this study can be adjusted to configure the imaging techniques for recievering less radiation used as a guide to study the dose patients receive from other general imaging radiation, such as general abdominal imaging or spinal imaging.Keywords: Entrance skin dose
ABSTRACT
Background: Assessment the curriculum is one of the essential factor in education to use the results as a feedback data to manage the education efficiently in accordance with the need of society-- in line with medical education quality assurance.Objectives: To assess the curriculum of the Bachelor of Technology Program in Biomedical Communications as perceived by the students graduating in 2005.Subject and Method: This was descriptive research using both concurrent and analytical evaluations. Seventeen of 2nd-year students were surveyed on February 2006. The checklist and the 1-5 Likert’s scale questionnaire were used and developed some categories as research instrument. The collected data were analyzed by using SPSS V.11.5 and the results were presented as percentages, means and standard deviation.Result:The response rate was 100% (males 76.5%, females 23.5%) whose GPAs ranged between 2.00-2.49 (5.9%), 2.50 - 2.99 (76.5%) and 3.00 - 3.49 (17.6%). Most students in the 1st year were more satisfied and in the 2nd year satisfied with the instruction and the curriculum content (3.73±0.61, 3.37±0.62 respectively). The study revealed that most students were satisfied with the program’s arrangement in the general education and more satisfied with specific subject and free elective (3.34±0.70, 4.08±0.53 and 3.97±0.71 respectively). Courses that the students found inappropriate was biostatistics (2.47±1.23)Conclusion: Overall the students were satisfied with the instruction and curriculum in the general education, specific subjects and free elective. One subject in the general education was considered inappropriate. An effort should be made, therefore, to make these courses more useful to students of this level. Finally, the students felt positive about the opportunities to be biomedical communications specialists.Key word: Assessment, curriculum, biomedical communications students, Likert’s scale.